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The MIDLAND INDUSTRIES SS6400-06-06 is a straight hydraulic adapter machined from 316 stainless steel. It connects a 3/8-inch Male JIC fitting on one end to a 3/8-inch Male O-Ring Boss (ORB) port on the other, using a 9/16-18 thread form. At 1.299 inches in length and rated to 5,000 psi maximum operating pressure, this fitting is built for high-pressure fluid and gas lines where corrosion resistance is required. It is installed by hydraulic technicians, plumbers, and industrial maintenance trades working on systems that demand leak-free, pressure-rated stainless connections.
This adapter is suited for use in hydraulic systems, fluid power lines, and pneumatic circuits operating in corrosive or high-temperature environments. The 316 stainless steel construction handles exposure to moisture, chemicals, and elevated temperatures up to 1,000 degrees F, making it appropriate for marine, chemical processing, food-grade, and heavy industrial applications. It fits inline wherever a JIC male end must transition to a male ORB port without a bulkhead or tee.
Designed as an OEM-style replacement or new-installation fitting for hydraulic and fluid power systems requiring a 3/8-inch Male JIC to 3/8-inch Male O-Ring Boss straight adapter in the SS6400 Series.
Installation should be performed by a qualified hydraulic or plumbing technician familiar with JIC and ORB fitting assembly. Depressurize and isolate the hydraulic or fluid circuit completely before removing or installing any fitting. Inspect threads and sealing surfaces for damage before assembly, and apply appropriate thread sealant or verify the O-ring is seated correctly on the ORB end. Follow system manufacturer pressure ratings and applicable industry standards for hydraulic fitting installation.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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